avformat: Allow choosing the dump format field separator.

The default is to maintain the previous ", " for now.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/avformat.h

@@ -1713,6 +1713,16 @@ typedef struct AVFormatContext {
      * via AVOptions (NO direct access).
      */
     int64_t probesize2;
+
+    /**
+     * dump format seperator.
+     * can be ", " or "\n      " or anything else
+     * Code outside libavformat should access this field using AVOptions
+     * (NO direct access).
+     * - muxing: Set by user.
+     * - demuxing: Set by user.
+     */
+    uint8_t *dump_separator;
 } AVFormatContext;
 
 int av_format_get_probe_score(const AVFormatContext *s);

libavformat/dump.c

@@ -27,6 +27,7 @@
 #include "libavutil/intreadwrite.h"
 #include "libavutil/log.h"
 #include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
 #include "libavutil/avstring.h"
 #include "libavutil/replaygain.h"
 #include "libavutil/stereo3d.h"
@@ -345,6 +346,7 @@ static void dump_stream_format(AVFormatContext *ic, int i,
     int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
     AVStream *st = ic->streams[i];
     AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
+    char *separator = ic->dump_separator;
 
     avcodec_string(buf, sizeof(buf), st->codec, is_output);
     av_log(NULL, AV_LOG_INFO, "    Stream #%d:%d", index, i);
@@ -378,7 +380,7 @@ static void dump_stream_format(AVFormatContext *ic, int i,
         int tbc = st->codec->time_base.den && st->codec->time_base.num;
 
         if (fps || tbr || tbn || tbc)
-            av_log(NULL, AV_LOG_INFO, "\n      ");
+            av_log(NULL, AV_LOG_INFO, "%s", separator);
 
         if (fps)
             print_fps(av_q2d(st->avg_frame_rate), tbr || tbn || tbc ? "fps, " : "fps");

libavformat/options_table.h

@@ -96,6 +96,7 @@ static const AVOption avformat_options[] = {
 {"unofficial", "allow unofficial extensions", 0, AV_OPT_TYPE_CONST, {.i64 = FF_COMPLIANCE_UNOFFICIAL }, INT_MIN, INT_MAX, D|E, "strict"},
 {"experimental", "allow non-standardized experimental variants", 0, AV_OPT_TYPE_CONST, {.i64 = FF_COMPLIANCE_EXPERIMENTAL }, INT_MIN, INT_MAX, D|E, "strict"},
 {"max_ts_probe", "maximum number of packets to read while waiting for the first timestamp", OFFSET(max_ts_probe), AV_OPT_TYPE_INT, { .i64 = 50 }, 0, INT_MAX, D },
+{"dump_separator", "set information dump field separator", OFFSET(dump_separator), AV_OPT_TYPE_STRING, {.str = ", "}, CHAR_MIN, CHAR_MAX, D|E},
 {NULL},
 };
 

libavformat/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 56
-#define LIBAVFORMAT_VERSION_MINOR  8
+#define LIBAVFORMAT_VERSION_MINOR  9
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \